Quadruple-rider flotation inner-tube



FIG. 1 is a perspective view of a quadruple-rider flotation inner-tube showing my new design;

FIG. 2 is a front elevation thereof, the elevations taken from vantage points rotated 90, 180 and 270 degrees are identical thereto;

FIG. 3 is a side elevation taken from a vantage point rotated 45 degrees from FIG. 2, the side elevations taken from a vantage point rotated 135, 225 and 315 degrees from FIG. 2 are identical to FIG. 3;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a quadruple-rider flotation inner-tube, as shown and described. 